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Session Report

Summary:
Test run at: 2016-12-30 10:05:02 GMT
Client Prefix (v4): 89.27.170.x/24
Client AS (v4): 8881 (VERSATEL)
IPv4 Probes: 105
Client Prefix (v6): 2001:67c:27xx::/40
Client AS (v6): 8881 (VERSATEL)
IPv6 Probes: 72
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA unknownunknown
Routable unknownunknown
Largest spoofable neighbor prefix length nonenone

Meaning of result status in column:

receivedSpoofed packet was received.Pattern of tests from this IP block indicates a switch from allowing spoofing to blocking it.
rewrittenSpoofed packet was received, but the source address was changed en route.
blockedSpoofed packet was not received, but unspoofed packet was.
unknownNeither spoofed nor unspoofed packet was received.

Warnings:

IPv4 AS Route:
This test run probed the following paths in order to infer your ability to send different spoofed source packets. Each node in the graph corresponds to an autonomous system, i.e. different Internet service providers. NOTE: This graph does NOT show if an AS blocks spoofed packets, only the path taken by received spoofed packets. The IP Path Details are available for this run. If non-spoofed packets weren't received at a destination, the traceroute to that destination is not included in this graph and may even cause a totally empty graph.

  

  

IPv4 Adjacent Netblock Testing:

Your host (89.27.170.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
89.27.170.x/24/318881natblock
89.27.170.x/24/308881natblock
89.27.170.x/24/298881natblock
89.27.170.x/24/288881natblock
89.27.170.x/24/278881natblock
89.27.170.x/24/268881natblock
89.27.170.x/24/258881natblock
89.27.170.x/24/248881natblock
89.27.171.x/24/238881natblock
89.27.168.x/24/228881natblock
89.27.174.x/24/218881natblock
89.27.162.x/24/208881natblock
89.27.186.x/24/198881natblock
89.27.138.x/24/188881natblock
89.27.234.x/24/178881natblock
89.27.42.x/24/1616086natblock
89.26.170.x/24/155626natblock
89.25.170.x/24/1431242natblock
89.31.170.x/24/1347720natblock
89.19.170.x/24/1215582natblock
89.11.170.x/24/1115659natblock
89.59.170.x/24/105430natblock
89.91.170.x/24/95410natblock
89.155.170.x/24/82860natblock

Meaning of status in Received column:

natblockSpoofed probe packets appear to be blocked by your local NAT or firewall rather than being rewritten with a public source address.

IPv4 Outbound Filtering Depth:

The tracefilter test found your host unable to spoof routable, non-adjacent source addresses through even the first IP hop.
Summary:
The results from all tests are aggregated to produce a summary "State of IP Spoofing" report.
Feedback:
We welcome questions and feedback to the Spoofer Information Mailing List and invite users to join the Spoofer Users Mailing List for discussion and announcements.
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